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A multi-stage magnetic liquid sealing device

A magnetic liquid and sealing device technology, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve problems such as sealing failure, and achieve the effect of uniform force and reduced working torque

Inactive Publication Date: 2017-06-30
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is that due to its own structural defects in the existing sealing form, when the sealing medium is liquid, the magnetic liquid and the sealed liquid dissolve or contaminate each other, resulting in seal failure

Method used

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  • A multi-stage magnetic liquid sealing device
  • A multi-stage magnetic liquid sealing device

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Effect test

Embodiment Construction

[0030] The present invention will be further described with accompanying drawing as specific embodiment:

[0031] A multi-stage magnetic liquid sealing device, which includes: a housing 1, a first bearing 2, a limit ring 3, a static ring 4, a pressure control valve 5, a moving ring 6, a spring 7, a spring seat 8, and a set screw 9 , left pole shoe 10, permanent magnet 11, right pole shoe 12, first rubber sealing ring 13, left snap ring 14, first retaining ring 15, second rubber sealing ring 16, third rubber sealing ring 17, fourth rubber sealing ring Seal ring 18, second stop ring 19, fifth rubber seal ring 20, shaft 21, magnetic fluid 22, sixth rubber seal ring 23, magnetic isolation stop ring 24, second bearing 25, right snap ring 26, end cover 27 .

[0032] Connections between the parts making up the device:

[0033] When assembling, first install the first bearing 2 into the left end of the casing 1, so that the first bearing 2 is close to the boss on the left end of the...

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Abstract

The invention belongs to the field of mechanical engineering sealing, and discloses a novel multi-stage magnetic liquid sealing device. The novel multi-stage magnetic liquid sealing device successfully solves the problem that an existing sealing mode can not avoid mutual dissolution or mutual contamination between magnetic liquid and a liquid medium to be sealed. The device comprises a first-stage seal and a second-stage seal, wherein the first-stage seal is formed by a static ring (4), a pressure control valve (5), a movable ring (6), a spring (7), a spring base (8) and a set screw (9), and the second-stage seal is formed by a left pole shoe (10), a permanent magnet (11) and a right pole shoe (12). The first-stage seal is mainly used for sealing a liquid medium to be sealed in a seal cavity and preventing the liquid medium to be sealed from making contact with magnetic liquid (22), the second-stage seal is mainly used for sealing gas charged into a cavity between the movable ring (6) and the left pole shoe (10), and even when a shaft (21) does not rotate, the novel multi-stage magnetic liquid sealing device can reliably seal the liquid medium to be sealed.

Description

technical field [0001] The invention relates to a multi-stage combined sealing device, which belongs to the technical field of mechanical engineering sealing, and is especially suitable for liquid sealing under the condition that magnetic liquid and a sealed medium can dissolve or pollute each other. Background technique [0002] At present, the mainstream sealing method is mechanical seal. However, a simple mechanical seal cannot achieve zero leakage, and the large amount of wear will easily pollute the sealing medium or the working environment. Magnetic liquid sealing technology has zero leakage, no wear, and long life. Simple structure and other advantages are gradually being used by more and more industries. However, when the sealing medium of pure magnetic liquid seal is liquid, the magnetic liquid is easy to dissolve or contaminate with the sealed liquid. [0003] Existing magnetic liquid sealing structure, as described in reference 1 (patent application with publicati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/43F16J15/40F16J15/10
CPCF16J15/16F16J15/40F16J15/43
Inventor 李德才姚杰姜华伟黄串
Owner BEIJING JIAOTONG UNIV
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